

#include "CTriangleBBSelector.h"
#include "ISceneNode.h"

namespace irr
{
    namespace scene
    {

        //! constructor
        CTriangleBBSelector::CTriangleBBSelector(ISceneNode* node)
            : CTriangleSelector(node)
        {
#ifdef _DEBUG
            setDebugName("CTriangleBBSelector");
#endif

            Triangles.set_used(12); // a box has 12 triangles.
        }



        //! Gets all triangles.
        void CTriangleBBSelector::getTriangles(core::triangle3df* triangles,
            s32 arraySize, s32& outTriangleCount, 
            const core::matrix4* transform)
        {
            if (!SceneNode)
                return;

            // construct triangles
            core::aabbox3d<f32> box = SceneNode->getBoundingBox();
            core::vector3df edges[8];
            box.getEdges(edges);

            Triangles[0].set( edges[3], edges[0], edges[2]);
            Triangles[1].set( edges[3], edges[1], edges[0]);

            Triangles[2].set( edges[3], edges[2], edges[7]);
            Triangles[3].set( edges[7], edges[2], edges[6]);

            Triangles[4].set( edges[7], edges[6], edges[4]);
            Triangles[5].set( edges[5], edges[7], edges[4]);

            Triangles[6].set( edges[5], edges[4], edges[0]);
            Triangles[7].set( edges[5], edges[0], edges[1]);

            Triangles[8].set( edges[1], edges[3], edges[7]);
            Triangles[9].set( edges[1], edges[7], edges[5]);

            Triangles[10].set(edges[0], edges[6], edges[2]);
            Triangles[11].set(edges[0], edges[4], edges[6]);

            // call parent
            CTriangleSelector::getTriangles(triangles, arraySize, outTriangleCount,	transform);
        }


    } // end namespace scene
} // end namespace irr

